Aristotle believed that the Earth was in a state of motion. He believed that it was moving in a circle around the sun.
In fact, Aristotle believed that everything on Earth moved constantly and never stopped moving. He believed this because everything he observed in nature was always changing, and since change is impossible unless something moves, he concluded that everything was always in motion.
Aristotle’s ideas about motion were based on his observations of objects around him. For example, he observed that when an object moves fast enough, it seems to be in a constant state of motion. He also noted that if you drop something from your hand, it will fall straight down toward Earth’s center, instead of curving downward like an object thrown vertically upward does.
In addition, Aristotle thought that this was because all objects naturally want to travel straight toward their natural place — which is the center of Earth for heavy objects and farther away from Earth for lighter objects (such as fire). Aristotle did not believe that gravity existed or had any effect on objects at all; instead he thought that objects fell because they wanted to go back to their natural place — which is why they would fall straight down toward Earth’s center if released far enough away from it.